KR20000039058A - Regulator valve device of electronically controlling oil pump - Google Patents

Abstract

PURPOSE: A regulator valve device is provided to keep pressure and flux of an engine lubricating circuit in the most suitable state regardless of the number of rotations and oil temperature by forming a solenoid valve for adjusting the opening of a valve and an electronic controller for controlling the solenoid valve. CONSTITUTION: An electronic controller(30) outputs a mapping data for setting the opening time and degree of a solenoid valve(20) based on the number of rotations, vehicle velocity, oil temperature and outer temperature. Thus, oil pressure and flux is controller in the most suitable state since the solenoid valve is controlled by the mapping data. An oil regulator valve is composed of the solenoid valves. Due to the oil regulator valve, the lubricator circuit of an engine is prevented from suddenly rising pressure and from rising hydraulic pressure caused by impurities inside an oil passage.

Description

Electronically controlled oil pump regulator valve device

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil pump regulator valve device, and more particularly, to a solenoid valve that can adjust the opening degree of a valve and an electronic control device for controlling the solenoid valve, so that the pressure and flow rate in the engine lubrication circuit are controlled by the engine speed The present invention relates to an electronically controlled oil pump regulator valve device that is maintained at an optimum state regardless of oil temperature, oil temperature, and the like.

As is well known, conventional engines used in automobiles include engine main bearings and connecting rod bearings, various bearings such as camshaft bearings, hydraulic lash adjusters, chain tensioners, Use oil pumps to supply oil to areas that require lubrication, such as pistons. The lubricator including such an oil pump is a kind of safety valve and is provided with a regulator valve for bypassing oil pumped from the oil pump when the pressure in the lubrication circuit is excessive.

An example of a lubricator employing the oil pump and regulator valve described above is schematically shown in FIG. 1. Referring to FIG. 1, the oil in the oil tank 5 is pumped by the oil pump 1, and the oil from the oil pump 1 is filtered in an oil filter 3 and then transferred to each lubrication circuit. . The regulator valve 10 acts to prevent the pressure in the lubrication circuit from being excessively raised. When the pressure in the lubrication circuit is greater than the spring (not shown) force in the valve 10, the oil in the lubrication circuit is bypassed and Stabilize the pressure.

By the way, the conventional regulator valve 10 is a mechanical structure that opens and closes the valve by operating the spring in the regulator valve 10 by the pressure difference between the two ends of the valve is always constant opening and closing by the size of each part and the spring constant, etc. Since the pressure is maintained, there is a problem that it is difficult to maintain the hydraulic pressure and the flow rate in an optimal state according to the engine and the surrounding environment (oil temperature, etc.), operating conditions, and the like.

That is, the conventional mechanical regulator valve to stabilize the hydraulic pressure and flow rate in the lubrication circuit to some extent, but the opening and closing pressure of the valve is fixed, there was a limit to improve the durability and performance of the engine.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and includes a solenoid valve which can adjust the opening degree of a valve by an electric signal, and an electronic control device for controlling the solenoid valve so that the pressure and flow rate in the engine lubrication circuit are increased. An object of the present invention is to provide an electronically controlled oil pump regulator valve device that is maintained at an optimum state regardless of engine speed, oil temperature, and the like.

1 is a block diagram of an oil pump regulator valve device according to the prior art,

2 is a block diagram of an electronically controlled oil pump regulator valve device according to the present invention.

<Description of the code | symbol about the principal part of drawing>

1 oil pump 3 oil filter

5: oil tank 20: solenoid valve type oil pump regulator valve

30: electronic control device

Electronically controlled oil pump regulator valve device according to the present invention for achieving the above object,

In the oil pump regulator valve device for regulating the pressure and flow rate in the engine lubrication circuit,

It includes electronic control means for receiving the respective signals related to the engine speed, engine load, vehicle speed, oil temperature, outside temperature to find and map the optimum operating conditions of the valve,

The regulator valve is characterized in that it comprises a solenoid valve that is controlled by the mapping data of the electronic control means to control the valve opening and closing time and the amount of opening and closing.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the electronically controlled oil pump regulator valve device according to the present invention. For the convenience of description, the same reference numerals are used for constituent members that have the same function as the constituent members used in the prior art.

2 is a block diagram of an electronically controlled oil pump regulator valve device according to the present invention, Figure 3 is a graph of the correlation between the engine speed and the oil flow rate for calculating the mapping data in the electronic control device of the present invention.

Referring to FIG. 2, the electronically controlled oil pump regulator valve device of the present invention receives an input signal of an engine speed, an engine load, a vehicle speed, an oil temperature, and an external temperature, and controls an electronic control to find and map an optimum operating condition of the valve. And a solenoid valve 20 that is controlled by the mapping data of the electronic control device 30 and whose valve opening / closing time and opening / closing amount are adjusted. Here, it will be apparent to those skilled in the art that the solenoid valve 20 has its opening degree adjusted by a bidirectional control signal of the electronic controller 30.

The operation of the electronically controlled oil pump regulator valve device of the present invention configured as described above will be described with reference to FIGS. 2 and 3.

First, the electronic controller 30 receives the engine speed, the engine load, the vehicle speed, the oil temperature, and the external temperature to calculate mapping data for setting the opening / closing time and the opening / closing amount of the solenoid valve 20 based on these signals. . Once the mapping data is calculated by the electronic controller 30, since the solenoid valve 20 is controlled through the mapping data, the oil pressure and the flow rate in the lubrication circuit are controlled optimally.

More specifically, the regulator valve composed of the solenoid valve 20 bypasses a part of the oil pumped by the oil pump 1 in order to prevent the hydraulic pressure in the engine from being excessively raised as in the related art. According to the oil regulator valve composed of the solenoid valve 20 as described above, due to the high viscosity of the oil during cold startup, the risk of hydraulic rise caused by sudden increase in pressure or foreign matter in the oil passage hinders the efficiency of the oil actively and effectively Is prevented.

In order to generate the map data of the oil pump regulator valve composed of the solenoid valve 20 controlled by the above-described electronic controller 30, the map input data affecting the lubrication system must first be determined. You have to figure it out. Since these factors may be different according to the engine and may also be changed by mapping strategy, it is preferable to correspond with case-by-case.

In general, the factors that affect the engine's lubrication characteristics are engine speed and oil temperature, but in some cases, data such as vehicle speed, engine load, and external temperature can also be used for mapping. To reduce the friction loss in the lubrication system and the pumping loss of the oil pump (1) and increase the efficiency under most operating conditions, the opening pressure of the regulator valve (20) is increased and the opening degree is reduced instead of lowering the pump (1) specification. Orientation can be reduced and the opening pressure can be reduced and the opening adjusted accordingly to increase the durability of the lubrication system components or the entire engine. However, in most cases, it is desirable to find the optimal condition by appropriately combining various factors in engine mapping in order to satisfy the conflicting goals as described above.

Hereinafter, for reference, the relationship between the vehicle driving conditions and the lubrication characteristics will be described.

The discharge flow rate of the oil and the required flow rate of the engine according to the engine speed are as shown in the graph of FIG. 3. When the regulator valve is fixed with a constant pressure difference, as in the conventional regulator valve 10, as shown in the graph of FIG. 3, the inclination before and after the pressure of the regulator valve varies, and the oil is linearly increased as the engine speed increases in each region. The flow rate of is increased. However, although the required flow rate of the engine varies depending on the characteristics of the engine, in general, it exhibits a parabolic characteristic curve in which the required flow rate is smaller than the increase in the engine speed, so that the optimum regulator valve ( 20) The opening degree can be determined.

Since the engine lubricating oil has a severe viscosity change depending on the temperature, it is necessary to compensate for the oil temperature in the regulator valve 20. The required oil flow rate of the engine is determined by the amount leaked from each bearing and the oil sink of the engine.If the viscosity changes with the oil temperature, the amount of leakage and shear stress due to the change of the bearing clearance It is possible to determine the optimum regulator valve 20 according to the oil temperature by comprehensively determining the change in the leakage amount according to the shear force) change.

Vehicle speed, external air temperature, engine load, etc. have less influence on the engine lubrication state than engine speed or oil temperature when determining the regulator valve 20 opening degree, but elements that can be included in the map of the electronic controller 30 as necessary. (factor) Since the vehicle speed is related to the flow rate of the cooling air in the regulator valve 20, especially in an engine equipped with an oil cooler, the oil temperature and lubrication conditions are affected. The load of the engine is an important factor that determines the amount of heat generated in the engine along with the engine speed and the oil temperature and lubrication conditions are affected by the amount of heat generated by the oil path in the engine. The outside temperature also affects the flow and heat transfer inside the engine compartment and is one of the main factors that determine the oil temperature and the temperature of each lubrication system component, which can be included in the map data.

In conclusion, according to the present invention, since the opening and closing time and the opening and closing amount of the regulator valve composed of the solenoid valve is controlled in the electronic control device according to the operating conditions such as the engine and the surrounding environment, the hydraulic pressure and the flow rate in the lubrication circuit are maintained at the optimum state. do.

As described above, the electronically controlled oil pump regulator valve device according to the present invention includes a solenoid valve capable of adjusting the opening degree of the valve by an electric signal and an electronic control device for controlling the solenoid valve, thereby providing a pressure in the engine lubrication circuit. It provides the advantage that the overflow is maintained at the optimum state regardless of engine speed, oil temperature, etc.

The invention is not limited to the embodiments described herein, but may be modified and changed by those skilled in the art without departing from the spirit and scope described in the appended claims.

Claims (1)

In the oil pump regulator valve device for regulating the pressure and flow rate in the engine lubrication circuit, It includes electronic control means for receiving the respective signals related to the engine speed, engine load, vehicle speed, oil temperature, outside temperature to find and map the optimum operating conditions of the valve, The regulator valve is an electronically controlled oil pump regulator valve device characterized in that it comprises a solenoid valve that is controlled by the mapping data of the electronic control means and the valve opening and closing time and the amount of opening and closing.